7/25/2019 Worksheet - Work and Power Problems (1)

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 LYCEUM OF THE PHILIPPINES – LAGUNA

  (Formerly Lyceum Institute of Technology)  Km. 54 National Highway, a!iling, "alam#a Laguna

  COLLEGE OF ALLIED MEDICINE

$n% &emester &' $5*$+&u#ect- hysics

Teacher- /elon 0. "hing

 Name _____________________________________

I. Work A. Sample Problems:

  1. F = 200 Newtons Formula: _________________________________   d = 50 meters Substtuton: ______________________________ 

  W = ! Answer wt" unt o# measure: _________________  

  2. F = 5 Newtons Formula: _________________________________ 

  W = $5 %oules Substtuton: ______________________________   & = ! Answer wt" unt o# measure: _________________  

  '. W = 125 %oules Formula: _________________________________ 

  d = 10 meters Substtuton: ______________________________ 

  F = ! Answer wt" unt o# measure: _________________  

(. I# 150 %oules o# work s needed to mo)e a bo* 10 meters+ w"at #or,e was used!

-. Work Problems:

(. F = 0 N ________ 5. F = / N ________ /. W = 120 % ________ d = 5 m ________ W = $2 % ________ d = 2( m ________  

W = ! ________ d = ! ________ F = ! ________  

$. W = ! ________ . W = 1'.2 % ________ . W = 1'/ % ________ 

F = /2./ N ________ F = 2 N ________ d = 2$.2 m ________  

d = 1' m ________ d = ! ________ F = ! ________  

10. I# '/0 %oules o# work are needed to mo)e a ,rate a dstan,e o# ( meters+ w"at s t"e we"t o# t"e

  ,rate!

11. I# a roup o# workers ,an appl a #or,e o# 1000 Newtons to mo)e a ,rate 20 meters+ w"at amount

o# work wll t"e "a)e a,,ompls"ed!

12. I# / %oules o# work were ne,essar to mo)e a ( Newton ,rate+ "ow #ar was t"e ,rate mo)ed!

1'. 3ow mu," work s done n "oldn a 15 N sa,k o# potatoes w"le watn n lne at t"e ro,er

store #or ' mnutes.

7/25/2019 Worksheet - Work and Power Problems (1)

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II. Power 

A. Sample Problems:

  1. W= 500 %oules Formula: _________________________________ 

  t = 25 se,onds Substtuton: ______________________________ 

  P = ! Answer wt" unt o# measure: _________________  

  2. P = 25 watts Formula: _________________________________ 

  W = 5000 %oulesSubsttuton: ______________________________ 

  t = ! Answer wt" unt o# measure: _________________  

  '. P = 1$0 watts Formula: _________________________________ 

  t = 20 se,onds Substtuton: ______________________________   W = ! Answer wt" unt o# measure: _________________  

  (. I# a man mo)es a lare bo* t"at we"s 10 Newtons 20 meters n '0 se,onds+ "ow mu," powerwas used!

-. Power Problems

2. W = 100 % ________ 5. W = 225 % _______ /. P = 20 W ________ 

t = 10 s ________ P = 25 W _______ t = 15 s ________  P = ! ________ t = ! _______ W = ! ________  

$. W = 500 % ________ . W = ''/ % _______ . W = ! ________  t = 25 s ________ t = ! _______ t = 1/./ s ________  

P = ! ________ P = 1( W _______ P = /( W ________  

10. A person we"n /00 N ets on an ele)ator. 4"e ele)ator l#ts t"e person / m n 10 se,onds. 3ow  mu," power was used!

11. 3ow mu," tme s needed to produ,e $20 %oules o# work # 0 watts o# power s used!

12. I# / W o# power s produ,ed n 1 se,onds+ "ow mu," work s done!

1'. A set o# pulles l#ts an 00 N ,rate ( meters n $ se,onds. W"at power was used!